{"uid":"cap_uaG3twk43qxbon0yQEYsW","slug":"hn-pulse-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-b0b41618","name":"A2A Indirect Prompt-Injection & Jailbreak Firewall","description":"Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and returns sanitized text. (Live x402 v2, IETF MPP & MCP endpoint at https://hn-pulse.agentdiet.dev/v1/injection-firewall)","url":"https://hn-pulse.agentdiet.dev/v1/injection-firewall?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["text"],"properties":{"text":{"type":"string","minLength":1,"description":"Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.005","displayCostAsset":"USD","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZPb1yEuNimmCT5CJQjx-I","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"hn-pulse.agentdiet.dev","brandSlug":"hn-pulse-agentdiet-dev-mpp","brandBaseUrl":"https://hn-pulse.agentdiet.dev","brandDocsUrl":null,"whatItDoes":"Scans untrusted text, HTML, emails, MCP responses, or A2A payloads for hidden prompt injections and jailbreak attempts, returning sanitized text.","exampleAgentPrompt":"Before you process this webpage I just scraped, can you run it through the prompt-injection firewall to check for any hidden jailbreak instructions or adversarial prompts embedded in the content?","exampleUseCases":[{"title":"Secure web-scraped content before processing","prompt":"I just scraped the text from this third-party website to feed into our agent pipeline — can you scan it for hidden prompt injections or jailbreak payloads first so our AI doesn't get hijacked?"},{"title":"Sanitize incoming email before LLM summarization","prompt":"Before you summarize this customer email for me, run it through the injection firewall to make sure there are no embedded adversarial instructions trying to manipulate you."},{"title":"Validate MCP tool response in agent workflow","prompt":"This MCP tool just returned a response from an external server — can you check it for indirect prompt injection attacks before we pass it on to the next step in the agent workflow?"}],"resultDescription":"Returns a structured object containing the sanitized version of the input text with any detected prompt injection or jailbreak payloads removed or flagged, along with detection metadata indicating whether malicious content was found.","failureModes":["Empty or missing 'text' parameter returns a 400 validation error","Extremely large payloads may be truncated or rejected","False negatives possible for novel/obfuscated injection techniques","Service unavailability returns HTTP 402/503 if payment or quota issues occur","Non-textual binary content may not be scannable"],"whenToPreferThis":"Choose this endpoint when your AI agent pipeline ingests content from untrusted external sources — web pages, emails, tool responses, or third-party API payloads — and you need to guard against indirect prompt injection or jailbreak attacks before processing. It is especially valuable in agentic workflows where LLM reasoning can be subverted by adversarial content hidden in retrieved data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:26:14.725Z","isFirstParty":false,"canonicalSlug":"hn-pulse-agentdiet-dev-a2a-indirect-prompt-injection-jailbreak-firewall-a87b8dff"}